Open Drip-proof Motors aren’t designed for wet environments but due to its lower initial cost, preferred by equipment manufacturers. Furthermore, motors that are operated intermittently are at greater risk since they can accumulate moisture and with the passage of time deteriorate a motor’s operational life. This leads to condensation droplets that are absorbed by the insulation, leading to corrosion of the windings. For instance, when a warm motor shuts down, it sucks in cool air, which naturally would contain moisture due to the location. Compared to installations in dry areas, electric motors get an instant slump in their operating lives as soon as they’re set-up in a damp area. Along with heat, dust and poor lubrication, moisture is one of the leading causes of motor failure.
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